US 12,187,930 B2
Cross-linkable composition
Sang Ki Chun, Daejeon (KR); and Seul Gi Kang, Daejeon (KR)
Assigned to Shanjin Optoelectronics (NANJING) Co., Ltd., (CN)
Appl. No. 16/959,273
Filed by Shanjin Optoelectronics (Suzhou) Co., Ltd., Jiangsu (CN)
PCT Filed Apr. 24, 2019, PCT No. PCT/KR2019/004943
§ 371(c)(1), (2) Date Jun. 30, 2020,
PCT Pub. No. WO2019/209022, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 10-2018-0047793 (KR), filed on Apr. 25, 2018.
Prior Publication US 2021/0054242 A1, Feb. 25, 2021
Int. Cl. C09J 7/38 (2018.01); B32B 7/12 (2006.01); C08F 220/18 (2006.01)
CPC C09J 7/385 (2018.01) [B32B 7/12 (2013.01); C08F 220/1804 (2020.02); B32B 2457/20 (2013.01); C08F 2800/20 (2013.01); C08F 2810/20 (2013.01); C09J 2203/326 (2013.01); C09J 2301/302 (2020.08); C09J 2433/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An optical laminate comprising an optical film; and a pressure-sensitive adhesive layer formed on one side of the optical film and including a cross-linked product of a cross-linkable composition,
the optical film comprising a polyvinyl alcohol polarizer, in which the polyvinyl alcohol polarizer comprising a potassium component and a zinc component, and a ratio of the potassium component to the zinc component is in a range of 0.2 to 6,
the cross-linkable composition comprising an acrylic polymer having a carboxyl group; an ionic compound containing an alkali metal cation; a compound of Formula 1 below; and an epoxy cross-linking agent,

OG Complex Work Unit Chemistry
wherein,
R1 and R2 are each independently an alkyl group having 1 to 4 carbon atoms, R3 and R4 are each independently a hydrogen atom;
the cross-linkable composition does not comprise a metal chelate cross-linking agent and a metal-containing cross-linking catalyst;
the acrylic polymer comprises a polymerized unit of an alkyl (meth)acrylate monomer and a polymerized unit of a carboxyl group-containing monomer;
the carboxyl group-containing monomer is 2-(meth)acryloyloxyacetic acid, 3-(meth)acryloyloxypropyl acid, 4-(meth) acryloyloxybutyric acid, an acrylic acid dimer, itaconic acid, maleic acid, or maleic anhydride.